extended tasks.json and fixed launch.json

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "chrome",
+            "request": "launch",
+            "name": "chromium: tabber",
+            "url": "http://localhost:9000",
+            "webRoot": "${workspaceFolder}/src",
+            "breakOnLoad": true,
+            "sourceMapPathOverrides": {
+                "webpack:///src/*": "${webRoot}/*"
+            },
+            "preLaunchTask": "serve",
+            "postDebugTask": "terminate all tasks"
+        }
+    ]
+}

.vscode/tasks.json

@@ -16,7 +16,22 @@
             "args": [
                 "run",
                 "serve"
-            ]
+            ],
+            "isBackground": true
+        },
+        {
+            "label": "terminate all tasks",
+            "command": "echo ${input:terminate}",
+            "type": "shell",
+            "problemMatcher": []
+        }
+    ],
+    "inputs": [
+        {
+            "id": "terminate",
+            "type": "command",
+            "command": "workbench.action.tasks.terminate",
+            "args": "terminateAll"
         }
     ]
 }